Stop in for a cup of coffee

Interesting, Wireing diagram shows two backup light switches. One on the transmission, with three connections and another with two. Is the switch on the trans grounded? I dont see where the ground side of the circuit is introduced...
Fixed my '69. When I/We reinstalled the drive train, the connector plug must have not been pushed in all the way, fell out, and melted on the very close header.. Had a new harness for that, tied everything out of harms way, and replaced, and all is good. :thumbsup: